Geology of Diamonds|
February 18, 2014 | GeoscienceWorld.org
An interesting article on “Diamonds and the Geology of Mantle Carbon” that considers the various types of diamonds, their host rocks, inclusions, geographic distribution, environments of formation, age, trace element composition, textures, carbon/nitrogen isotopes, geobarometry, and lots more.
February 13, 2014 | Geology.com
Peridotite is a host rock of chromite, a source rock of diamonds, a potential sink for atmospheric carbon dioxide and the rock that makes up much of Earth’s mantle. Did you realize it was so important?
Related: Misconception: Diamonds Don’t Form From Coal
Reviewing the New Madrid Earthquakes|
February 4, 2014 | Smithsonian.com
An article on the Smithsonian.com website looks back at the New Madrid, Missouri earthquakes of 1811 and 1812 (the strongest earthquakes in the recorded history of the conterminous 48 states) and looks forward to the possibility that similar events might occur in the future.
New Madrid is not Slowing Down|
January 30, 2014 | USGS
“Earthquake activity in the New Madrid Seismic Zone in the central United States does not seem to be slowing down.
USGS investigates whether current quakes in the region could be aftershocks of large earthquakes that occurred 200 years earlier.” Quoted from the USGS press release.
Northridge Earthquake Web Exhibit|
January 14, 2014 | EarthquakeCountry.org
“The Northridge 20 Virtual Exhibit website presents teachable moments – to learn and reflect, to share and to act. Teeming with content, graphics and video recounting the events of January 1994, this exhibit seeks to empower and motivate us to make ourselves safer in future earthquakes.” Quoted from EarthquakeCountry.org.
Hot Rock Under the Atlas Mountains|
January 14, 2014 | University of Southern California
“The Atlas Mountains defy the standard model for mountain structure in which high topography must have deep roots for support, according to a new study from Earth scientists at USC.” Quoted from the University of Southern California press release.
Impact of Arizona Geology on Geologic Concepts|
January 1, 2014 | Arizona Geology
“Arizona makes up a tiny fraction of the land surface on Earth. However, it has had a comparatively larger impact on the evolution of geologic concepts, especially in three areas of geologic inquiry: (1) porphyry copper deposits, (2) metamorphic core complexes, and (3) evolution of large rivers.” Quoted from the Arizona Geology article.
Dissipation of Energy by Deep Earthquakes|
December 29, 2013 | NBC News
“An investigation of the most powerful earthquake ever recorded deep within the Earth suggests deep quakes may be better at dissipating pent-up energy than similar quakes near the surface.” Quoted from the NBC News story.
Size of the Yellowstone Magma Chamber Severely Underestimated?|
December 26, 2013 | National Geographic
The magma reservoir below Yellowstone National Park could be two-and-a-half times larger than previously thought!
Related: The Yellowstone Supervolcano
The Status of U.S. Secondary Earth Science Education|
October 19, 2013 | American Geosciences Institute
“The Center for Geoscience Education and Public Understanding at the American Geosciences Institute has released a landmark report on the status of Earth Science education in U.S. middle and high schools, describing in detail significant gaps between identified priorities and lagging practice.” Quoted from the AGI press release.
Higher Risk in the New Madrid Seismic Zone|
October 17, 2013 | USGS
New research provides insight on why the New Madrid Seismic Zone is unique and may continue to pose a higher earthquake risk than adjacent areas in the central United States.
Deep Sea Internet Has Geological Applications|
October 17, 2013 | University at Buffalo
“University at Buffalo researchers are developing a deep-sea Internet. The technological breakthrough could lead to improvements in tsunami detection, offshore oil and natural gas exploration, surveillance, pollution monitoring and other activities.” Quoted from the University at Buffalo press release.
The Government Shutdown and Geology|
October 15, 2013 | American Geophysical Union
The American Geophysical Union has a short article that explains why the “Government Shutdown Affects More Than Jobs“.
Magnitude 7.7 Earthquake Kills Over 200 in Pakistan
September 25, 2013 | The Weather Channel
At least 200 people were killed by a magnitude 7.7 earthquake in Pakistan’s Baluchistan province.
There is a report that a mud volcano formed an island off the coast in the Arabian Sea at the same time that the earthquake was occurring. The Weather Channel video has comments on this from a USGS scientist.
The Largest Deep Earthquake Ever Recorded|
September 22, 2013 | University of California Santa Cruz
“A magnitude 8.3 earthquake that struck deep beneath the Sea of Okhotsk on May 24, 2013, has left seismologists struggling to explain how it happened. At a depth of about 609 kilometers (378 miles), the intense pressure on the fault should inhibit the kind of rupture that took place.” Quoted from the University of California Santa Cruz press release.
Monitoring Slow Earthquakes to Predict Large Earthquakes?|
September 16, 2013 | Penn State University
“We currently don’t have any way to remotely monitor when land faults are about to move” [...] “This has the potential to change the game for earthquake monitoring and prediction, because if it is right and you can make the right predictions, it could be big.”
Explosive Magma Can Lurk for 100000 Years|
September 12, 2013 | University of Washington
“Reservoirs of silica-rich magma — the kind that causes the most explosive volcanic eruptions — can persist in the Earth’s upper crust for hundreds of thousands of years without triggering an eruption, according to new University of Washington research.”
Detecting Large Landslides in Remote Areas|
September 4, 2013 | NASA Earth Observatory
“Even when they occur in remote areas, large landslides can dam rivers and lead to devastating downstream floods. [...]
Automated earthquake detection systems are tuned to monitor intense, “short-period” waves produced by sudden slips along tectonic faults. Landslides produce seismic waves as well, though their short-period signal is weak. Instead, they make powerful long-period waves that are sometimes detectable at great distances.” Quoted from the Earth Observatory article.
2011 Tohoku Earthquake and Seiches in Norwegian Fjords|
August 26, 2013 | LiveScience
The March 11, 2011 Magnitude 9.0 earthquake that shook northeastern Japan also produced seiches in Norweigian fjords.
Imploding a Building to Learn about the Hayward Fault
August 15, 2013 | USGS
“When 13-story Warren Hall is imploded by demolition experts this weekend on the Hayward campus of California State University, East Bay, U.S. Geological Survey scientists will monitor the pulse of energy on nearly 600 seismometers temporarily placed in a two-mile radius around the building with help from hundreds of citizen-scientist hosts and volunteers.” Quoted from the USGS website.
Popular Stories for July 15 to July 31|
August 3, 2013 | Geology.com
Sinkhole Photos – Wow!
Debris Flow in Southern Utah
The Strangest Volcanic Landscape
Thousands of Volcanoes in Arizona?
An Embryonic Subduction Zone in the Atlantic?
The Geologist Who Discovered Canadian Diamonds
Top Diamond Producers
USGS on Man-Made Earthquakes|
July 22, 2013 | USGS
“The number of earthquakes has increased dramatically over the past few years within the central and eastern United States. [...] This increase in earthquakes prompts two important questions: Are they natural, or man-made?” Quoted from the USGS blog post.
July 21, 2013 | MIT
“But there remains one lingering mystery: If the Earth arose from the collision of asteroids, its composition should resemble that of meteoroids, the small particles that break off from asteroids. But to date, scientists have found that, quite literally, something doesn’t add up: Namely, the Earth’s mantle — the layer between the planet’s crust and core — is missing an amount of lead found in meteorites whose composition has been analyzed following impact with the Earth.” Quoted from the MIT press release.
Related: What is the Moho?
Did the Lower Crust Flow on Mars?|
July 19, 2013 | Speaking of Geoscience Blog
“In particular, the southeast region of Tharsis bears strong resemblance in structure and topography to eastern Tibet. High topography and thick crust of eastern Tibet produces long, low-gradient plateau margins that may be caused by the flow of weakened lower crust. This has me thinking: if the lower crust flows in Tibet, did it do so on Mars?” Quoted from the Speaking of Geoscience article.
Waste Injection Tremors Triggered by Distant Earthquakes?|
July 17, 2013 | Columbia University
“Large earthquakes from distant parts of the globe are setting off tremors around waste-fluid injection wells in the central United States…” Quoted from the Columbia University press release.